feat(neovim): experiment with ai agents (#237)

The following changes are introduced:

* Update `kickstart.nvim` to latest commit ([6ba24..3338d](6ba2408cdf..3338d39206))
* Add [`goose`](https://block.github.io/goose/) and [`goose.nvim`](https://block.github.io/goose/)
* Re-enable [`avante.nvim`](https://block.github.io/goose/)

Reviewed-on: #237
Co-authored-by: Joao P Dubas <joao.dubas+gitea@gmail.com>
Co-committed-by: Joao P Dubas <joao.dubas+gitea@gmail.com>

config/goose/config.yaml

@@ -0,0 +1,43 @@
+ANTHROPIC_HOST: https://api.anthropic.com
+GOOSE_PROVIDER: google
+GOOSE_MODEL: gemini-2.5-pro-preview-05-06
+extensions:
+  computercontroller:
+    bundled: true
+    display_name: Computer Controller
+    enabled: true
+    name: computercontroller
+    timeout: 600
+    type: builtin
+  context7:
+    args:
+    - dlx
+    - '@upstash/context7-mcp@latest'
+    bundled: null
+    cmd: pnpm
+    description: null
+    enabled: true
+    env_keys: []
+    envs: {}
+    name: context7
+    timeout: 600
+    type: stdio
+  developer:
+    bundled: true
+    display_name: Developer Tools
+    enabled: true
+    name: developer
+    timeout: 600
+    type: builtin
+  git:
+    args:
+    - mcp-server-git
+    bundled: null
+    cmd: uvx
+    description: null
+    enabled: true
+    env_keys: []
+    envs: {}
+    name: git
+    timeout: 600
+    type: stdio