docs: Add a Manual_Probe.md document

Add information on calibrating the bed on traditional printers with a
Z endstop and bed screws.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

2 files changed, 202 insertions, 0 deletions

diff --git a/docs/img/bed_screws.svg b/docs/img/bed_screws.svg
new file mode 100644
index 00000000..631af81e
--- /dev/null
+++ b/docs/img/bed_screws.svg
@@ -0,0 +1,202 @@
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diff --git a/docs/img/bed_screws.svg.png b/docs/img/bed_screws.svg.png
new file mode 100644
index 00000000..d2dda545
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