feat(tools): make repo the canonical repo-identifier arg; name now an alias (#38)

Every caller (claude.ai connector, LLMs primed on gitea/GitHub) sends the repo
identifier as `repo`, but the 33 per-repo identifier tools advertised `name`.
The v0.2.8 shim aliased repo->name so it worked, yet the advertised inputSchema
still said `name` — a misleading contract, with the shim load-bearing.

- Flip all 33 identifier tools: schema property + required + struct field/tag
  from `name` to `repo`. A compliant `repo` caller now matches the struct
  directly; the shim is pure back-compat.
- normalizeAliases is now bidirectional (name<->repo), so legacy `name` callers
  still resolve, and repo_create / create_project_from_template — whose `name`
  means "name of the NEW repo", not an existing-repo id — keep `name` and still
  accept `repo`.
- `number`/`index` left as-is (out of scope; separate pre-existing quirk where
  pr_merge advertises `index` rather than `number`).
- Tests: schema-canonical assertion + flipped alias round-trip (explicit `repo`
  wins over `name`).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

internal/tools/file_write_branch.go

@@ -28,7 +28,7 @@ func (t *FileWriteBranch) Descriptor() registry.ToolDescriptor {
 			"type":"object",
 			"properties":{
 				"owner":{"type":"string"},
-				"name":{"type":"string"},
+				"repo":{"type":"string"},
 				"path":{"type":"string"},
 				"content":{"type":"string"},
 				"branch":{"type":"string"},
@@ -36,14 +36,14 @@ func (t *FileWriteBranch) Descriptor() registry.ToolDescriptor {
 				"message":{"type":"string"},
 				"sha":{"type":"string"}
 			},
-			"required":["owner","name","path","content","branch","message"]
+			"required":["owner","repo","path","content","branch","message"]
 		}`),
 	}
 }
 
 type fileWriteBranchArgs struct {
 	Owner   string `json:"owner"`
-	Name    string `json:"name"`
+	Repo    string `json:"repo"`
 	Path    string `json:"path"`
 	Content string `json:"content"`
 	Branch  string `json:"branch"`
@@ -68,7 +68,7 @@ func (t *FileWriteBranch) Call(ctx context.Context, raw json.RawMessage) (json.R
 	}
 
 	// Resolve base default if branch needs to be created
-	exists, err := t.c.BranchExists(ctx, args.Owner, args.Name, args.Branch)
+	exists, err := t.c.BranchExists(ctx, args.Owner, args.Repo, args.Branch)
 	if err != nil {
 		return nil, err
 	}
@@ -76,18 +76,18 @@ func (t *FileWriteBranch) Call(ctx context.Context, raw json.RawMessage) (json.R
 		base := args.Base
 		if base == "" {
 			var err error
-			base, err = t.c.DefaultBranch(ctx, args.Owner, args.Name)
+			base, err = t.c.DefaultBranch(ctx, args.Owner, args.Repo)
 			if err != nil {
 				return nil, err
 			}
 		}
-		if err := t.c.CreateBranch(ctx, args.Owner, args.Name, args.Branch, base); err != nil {
+		if err := t.c.CreateBranch(ctx, args.Owner, args.Repo, args.Branch, base); err != nil {
 			return nil, err
 		}
 	}
 
 	encoded := base64.StdEncoding.EncodeToString([]byte(args.Content))
-	result, err := t.c.UpsertFile(ctx, args.Owner, args.Name, args.Path, gitea.UpsertFileArgs{
+	result, err := t.c.UpsertFile(ctx, args.Owner, args.Repo, args.Path, gitea.UpsertFileArgs{
 		Branch:  args.Branch,
 		Content: encoded,
 		Message: args.Message,