feat: remove -o env from search command

- Remove OutputMode::Env from output.rs
- Remove env output branch and shell_quote from search.rs
- Update docs (AGENTS.md, README.md, main.rs help)

Bump version to 0.7.5

Made-with: Cursor

src/commands/search.rs

@@ -55,24 +55,6 @@ pub async fn run(pool: &PgPool, args: SearchArgs<'_>) -> Result<()> {
             };
             println!("{}", out);
         }
-        OutputMode::Env => {
-            if rows.len() > 1 {
-                anyhow::bail!(
-                    "env output requires exactly one record; got {}. Add more filters.",
-                    rows.len()
-                );
-            }
-            if let Some(row) = rows.first() {
-                let map = build_metadata_env_map(row, "");
-                let mut pairs: Vec<(String, String)> = map.into_iter().collect();
-                pairs.sort_by(|a, b| a.0.cmp(&b.0));
-                for (k, v) in pairs {
-                    println!("{}={}", k, shell_quote(&v));
-                }
-            } else {
-                eprintln!("No records found.");
-            }
-        }
         OutputMode::Text => {
             if rows.is_empty() {
                 println!("No records found.");
@@ -302,12 +284,6 @@ pub fn build_injected_env_map(
     Ok(map)
 }
 
-/// Quote a value for safe shell / env output. Wraps in single quotes,
-/// escaping any single quotes within the value.
-fn shell_quote(s: &str) -> String {
-    format!("'{}'", s.replace('\'', "'\\''"))
-}
-
 /// Convert a JSON value to its string representation suitable for env vars.
 fn json_value_to_env_string(v: &Value) -> String {
     match v {