fix(typos): correct spelling mistakes

src/app.zig

@@ -17,7 +17,7 @@ const log = std.log.scoped(.app);
 ///
 /// _R_ is the type function for the `Renderer` to use. The parameter boolean
 /// will be set to the _fullscreen_ value at compile time. The corresponding
-/// `Renderer` type is accessable through the generated type of this function.
+/// `Renderer` type is accessible through the generated type of this function.
 ///
 /// _fullscreen_ will be used to configure the `App` and the `Renderer` to
 /// respect the corresponding configuration whether to render a fullscreen tui

src/event.zig

@@ -69,7 +69,7 @@ pub fn mergeTaggedUnions(comptime A: type, comptime B: type) type {
     } });
 }
 
-// Determine at `comptime` wether the provided type `E` is an `union(enum)`.
+// Determine at `comptime` whether the provided type `E` is an `union(enum)`.
 pub fn isTaggedUnion(comptime E: type) bool {
     switch (@typeInfo(E)) {
         .Union => |u| {

src/widget.zig

@@ -72,7 +72,7 @@ pub fn Widget(comptime Event: type) type {
             };
         }
 
-        // TODO: import and export of `Widget` implementations (with corresponding intialization using `Event`)
+        // TODO: import and export of `Widget` implementations (with corresponding initialization using `Event`)
         pub const RawText = @import("widget/RawText.zig").Widget(Event);
     };
 }