chore: replace submodule with bootstrap script for test dependency

Remove the .tests/vendor/plenary.nvim git submodule so Neovim plugin
managers (lazy.nvim, etc.) don't pull it during installation. Instead,
run_tests.ps1 and run_checks.ps1 clone plenary.nvim on demand if it's
not present. The .gitea CI workflow also gets its own bootstrap step.
Add .gitignore to exclude the bootstrapped vendor directory.

.gitea/workflows/pull_request.yaml

@@ -31,5 +31,7 @@ jobs:
         run: stylua --check .
       - name: Lint
         run: lua-language-server --check=.
+      - name: Bootstrap plenary.nvim
+        run: git clone --depth 1 https://github.com/nvim-lua/plenary.nvim .tests/vendor/plenary.nvim
       - name: Test
         run: nvim --headless -c "PlenaryBustedDirectory tests/watchexec/ {minimal_init = 'tests/minimal_init.lua'}" -c "q"

.gitignore

@@ -0,0 +1 @@
+.tests/vendor/

.gitmodules

@@ -1,3 +0,0 @@
-[submodule ".tests/vendor/plenary.nvim"]
-	path = .tests/vendor/plenary.nvim
-	url = https://github.com/nvim-lua/plenary.nvim

run_checks.ps1

@@ -21,6 +21,14 @@ if ($LASTEXITCODE -ne 0) {
 
 Write-Host "PASS" -ForegroundColor Green
 
+$plenaryPath = ".tests/vendor/plenary.nvim"
+
+if (-not (Test-Path $plenaryPath)) {
+  Write-Host "Bootstrapping plenary.nvim for tests..." -ForegroundColor Yellow
+  New-Item -ItemType Directory -Path ".tests/vendor" -Force | Out-Null
+  git clone --depth 1 https://github.com/nvim-lua/plenary.nvim $plenaryPath
+}
+
 Write-Host "`n=== Test ==="
 
 nvim --headless -c "PlenaryBustedDirectory tests/watchexec/ {minimal_init = 'tests/minimal_init.lua'}"

run_tests.ps1

@@ -1 +1,9 @@
+$plenaryPath = ".tests/vendor/plenary.nvim"
+
+if (-not (Test-Path $plenaryPath)) {
+  Write-Host "Bootstrapping plenary.nvim for tests..." -ForegroundColor Yellow
+  New-Item -ItemType Directory -Path ".tests/vendor" -Force | Out-Null
+  git clone --depth 1 https://github.com/nvim-lua/plenary.nvim $plenaryPath
+}
+
 nvim --headless -c "PlenaryBustedDirectory tests/watchexec/ {minimal_init = 'tests/minimal_init.lua'}"