feat: add gist command (#12)

Add a command for finding and viewing Github gists.

For more info, see `gh gist list --help` and the readme:
https://github.com/benelan/gh-fzf#gist

README.md

@@ -12,6 +12,7 @@ An fzf wrapper around the GitHub CLI.
     - [`run`](#run)
     - [`repo`](#repo)
     - [`release`](#release)
+    - [`gist`](#gist)
   - [Configuration](#configuration)
   - [Related projects](#related-projects)
 
@@ -239,6 +240,26 @@ that can be used with any `gh fzf` command:
     gh fzf release --exclude-drafts --exclude-pre-releases
     ```
 
+### `gist`
+
+- **Usage**: `gh fzf gist [flags]`
+- **Aliases**: `gists`, `--gist`, `--gists`
+- **Flags**: See `gh gist list --help` for available options
+- **Keybindings**:
+  - `enter`: Edit the selected gist
+    (see `gh gist edit --help`)
+  - `alt-c`: Clone the selected gist to the current directory
+    (see `gh gist clone --help`)
+  - `alt-X`: Delete the selected gist
+    (see `gh gist delete --help`)
+  - `alt-s`: Filter the list, showing only secret gists
+  - `alt-p`: Filter the list, showing only public gists
+- **Examples**:
+  - Filter the initial list to only show public gists (excluding secret ones):
+    ```sh
+    gh fzf gist --public
+    ```
+
 ## Configuration
 
 Environment variables are used to configure different options in `gh-fzf`.
@@ -274,9 +295,12 @@ aliases:
 
 When adding or modifying fzf keybindings:
 
-- Use `{1}` in place of the `<number>` for the `issue`/`pr` commands and in
-  place of the `<tag-name>` for the `release` command.
-- Use `{-1}` in place of the `<run-id>` for the `run` command.
+- Use `{1}` in place of:
+  - the `<number>` for the `issue` and `pr` commands
+  - the `<tag>` for the `release` command
+  - the `<id>` for the `gist` command
+- Use `{-1}` in place of:
+  - the `<run-id>` for the `run` command
 
 For a list of the fzf options shared by all `gh-fzf` commands, see the
 [source code](https://github.com/benelan/gh-fzf/blob/c455e3034f49da1ae81c26779de2419fda87e4a8/gh-fzf#L145-L165).

gh-fzf

@@ -55,6 +55,7 @@ Core Commands:
   run         Search for and interact with GitHub Action runs.
   repo        Search for and interact with GitHub repos.
   release     Search for and interact with GitHub releases.
+  gist        Search for and interact with GitHub gists.
 
 See \`gh <command> list --help\` for the flag options.
 
@@ -127,7 +128,7 @@ FZF_DEFAULT_OPTS='
 # --------------------------------------------------------------------- {|}
 
 default_cmd() {
-    FZF_DEFAULT_COMMAND="printf 'COMMAND\n%s\n%s\n%s\n%s\n%s\n' 'issue' 'pr' 'run' 'repo' 'release'" \
+    FZF_DEFAULT_COMMAND="printf 'COMMAND\n%s\n%s\n%s\n%s\n%s\n%s\n' 'issue' 'pr' 'run' 'repo' 'release' 'gist'" \
         fzf \
         --preview='GH_FORCE_TTY=$FZF_PREVIEW_COLUMNS gh help {}' \
         --preview-window='right:75%,wrap' \
@@ -469,6 +470,31 @@ Filters > (alt-s: stable) (alt-p: published) (alt-a: ascending)
         --bind='alt-a:reload(eval "$FZF_DEFAULT_COMMAND --order asc")'
 }
 
+# --------------------------------------------------------------------- }}}
+# Command > gist                                                        {{{
+# --------------------------------------------------------------------- {|}
+
+gist_cmd() {
+    gist_header='Actions > (enter: edit) (alt-c: clone) (alt-X: delete)
+        > (ctrl-o: open url) (ctrl-y: copy url) (ctrl-r: reload)
+Filters > (alt-p: public) (alt-s: secret)
+
+'
+
+    FZF_DEFAULT_COMMAND="GH_FORCE_TTY=$gh_columns gh gist list -L $GH_FZF_DEFAULT_LIMIT $*" \
+        fzf \
+        --preview='GH_FORCE_TTY=$FZF_PREVIEW_COLUMNS gh gist view {1}' \
+        --header="$gist_header" \
+        --bind="start:$on_start" \
+        --bind='ctrl-o:execute-silent(gh gist view --web {1})' \
+        --bind="ctrl-y:execute-silent(echo https://gist.github.com/$(gh api user -q .login)/{1} | $GH_FZF_COPY_CMD)" \
+        --bind='enter:execute(gh gist edit {1})' \
+        --bind='alt-c:execute(gh gist clone {1})' \
+        --bind="alt-X:execute(gh gist delete {1})" \
+        --bind='alt-p:reload(eval "$FZF_DEFAULT_COMMAND --public")' \
+        --bind='alt-s:reload(eval "$FZF_DEFAULT_COMMAND --secret")'
+}
+
 # --------------------------------------------------------------------- }}}
 # Parse arguments                                                       {{{
 # --------------------------------------------------------------------- {|}
@@ -507,6 +533,7 @@ main() {
         r | -r | run | runs | --run | --runs) run_cmd "$@" ;;
         repo | repos | --repo | --repos) repo_cmd "$@" ;;
         release | releases | --release | --releases) release_cmd "$@" ;;
+        gist | gists | --gist | --gists) gist_cmd "$@" ;;
         v | V | -v | -V | version | --version) printf "%s\n" "$GH_FZF_VERSION" ;;
         *) error "invalid command: \"$command\"" ;;
     esac