[TIR] Enhance Python Type Annotations for TIR stmt (#16076)

This PR enhances the Python annotations for the TIR stmt,
adding class member variables annotations.

Author: Siyuan Feng

include/tvm/tir/stmt.h

@@ -68,7 +68,7 @@ class LetStmtNode : public StmtNode {
  public:
   /*! \brief The variable. */
   Var var;
-  /*! \brief The value to be binded. */
+  /*! \brief The value to be bound. */
   PrimExpr value;
   /*! \brief The body block. */
   Stmt body;
@@ -876,7 +876,7 @@ class SeqStmt : public Stmt {
 };
 
 /*!
- * \brief IfThenElse statment.
+ * \brief IfThenElse statement.
  */
 class IfThenElseNode : public StmtNode {
  public:
@@ -951,7 +951,7 @@ enum class ForKind : int {
 };
 
 /*!
- * \brief A for loop, with poissible type annotations.
+ * \brief A for loop, with possible type annotations.
  *
  * \code
  *
@@ -1388,7 +1388,7 @@ namespace attr {
 constexpr const char* thread_extent = "thread_extent";
 /*! \brief Mark launching of a virtual thread. */
 constexpr const char* virtual_thread = "virtual_thread";
-/*! \brief Mark region is processed by a co-proccesor */
+/*! \brief Mark region is processed by a co-processor */
 constexpr const char* coproc_scope = "coproc_scope";
 /*!
  * \brief Mark region creates coprocessor micro ops,