style: capitalize "Relicario" in prose / UI / CLI help

Brand name uses capital R in user-facing text — extension UI strings,
CLI clap help / descriptions / error prose, markdown docs. Lowercase
preserved for the binary command, crate names, npm package, file
paths, env vars, and code identifiers.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

crates/relicario-cli/src/main.rs

@@ -1,4 +1,4 @@
-//! relicario CLI — the platform layer for the relicario password manager.
+//! Relicario CLI — the platform layer for the Relicario password manager.
 //!
 //! See module docs for the unlock flow and vault layout.
 
@@ -14,7 +14,7 @@ use clap::{Parser, Subcommand};
 #[command(
     name = "relicario",
     version,
-    about = "Git-backed password manager with reference-image two-factor unlock"
+    about = "Relicario — git-backed password manager with reference-image two-factor unlock"
 )]
 struct Cli {
     #[command(subcommand)]
@@ -462,7 +462,7 @@ fn cmd_init(image: PathBuf, output: PathBuf) -> Result<()> {
         ".relicario/salt", "manifest.enc", "settings.enc",
     ]).status()?;
     let status = crate::helpers::git_command(&root, &[
-        "commit", "-m", "init: new relicario vault (format v2)",
+        "commit", "-m", "init: new Relicario vault (format v2)",
     ]).status()?;
     if !status.success() { anyhow::bail!("git commit failed"); }
 
@@ -1477,7 +1477,7 @@ fn cmd_backup_restore(input: PathBuf, target: PathBuf) -> Result<()> {
 
     if target.join(".relicario").exists() {
         anyhow::bail!(
-            "target dir already contains a relicario vault; restore refuses to overwrite — use an empty directory: {}",
+            "target dir already contains a Relicario vault; restore refuses to overwrite — use an empty directory: {}",
             target.display()
         );
     }