Fix various misspellings found by the typos tool: - Error messages: Forbiden -> Forbidden, insufficent -> insufficient - Comments and docs: recieve -> receive, acheive -> achieve, etc. - Variable names: Referencs -> References, intialize -> initialize - HTML templates: Unubscribe -> Unsubscribe, explictly -> explicitly - Function names: perferom -> perform Also remove backwards compat code for is_deafult JSON field. Add _typos.toml config for false positives (external APIs, etc.) Signed-off-by: eti <eti@eti.tf>